Unnamed (north of Columbia Point)

Occurrence, Probably inactive

Commodities and mineralogy

Main commodities Cu
Ore minerals chalcopyrite; covellite; hematite; malachite
Gangue minerals calcite

Geographic location

Quadrangle map, 1:250,000-scale SI
Quadrangle map, 1:63,360-scale D-4
Latitude 57.7944
Longitude -135.11
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at an elevation of about 2,000 feet, about 1.2 miles north of Columbia Point in Tenakee Inlet. The occurrence is 0.2 mile northwest of the center of sec. 18, T. 47 S., R. 64 E. It is location P-27 of Bittenbender and others (1999) and MAS no. 0021140200 (U.S. Bureau of Land Management, 2002). The location is accurate within 0.2 mile.

Geologic setting

Geologic description

The rocks in the vicinity of this occurrence are part of the Devonian, Kennel Creek Limestone which consists of limestone, minor dolomite, limestone breccia, shale, and siltstone (Lathram and others, 1965). Calcite veins in a a diabase dike contain chalcopyrite, malachite, hematite, and covellite. (Loney and others, 1963).
Geologic map unit (-135.11177846334, 57.7940598559165)
Mineral deposit model Calcite veins with copper minerals in a diabase dike.
Age of mineralization Devonian or younger based on the age of the host rock.

Production and reserves

Workings or exploration Only surface sampling.
Indication of production None